Amends GS 67-4.1 and 67-4.3 as titles indicates; changes are designated the Haiden Prevatte Act.  Amends definition of dangerous dog in GS 67-4.1 to add a local law enforcement officer to list of persons who can determine whether a dog is "potentially dangerous," and to make minor language clarifications.  Amends GS 67-4.3 by removing the minimum cost of medical treatment for physical injury by a dangerous dog attack before its owner may be found guilty of a Class 1 misdemeanor, and by adding a new penalty to make the owner of a dangerous dog that kills a person guilty of a Class I felony.  Effective December 1, 2019, and applies to offenses committed on or after that date.